3-2-3,4 Auto Changeover - Fujitsu AUXB04GALH Service Manual

3-2-2 Auto Changeover
[Method]
1. Switch operation mode management to "Management by indoor unit" by outdoor unit DIP-SW.
2. Set the master indoor unit by wired remote controller.
3. Judge cooling/heating by the difference between the master indoor unit's setting temperature and
the room temperature.
AUTO CHANGEOVER operation
Operation flow chart
START
Room temp.
Ts+2°C ?
NO
Room temp.
Ts- 2°C ?
HEATING OPERATION
Thermostat remains
YES
in OFF state for 6 minutes or
longer?
System stops
YES
or operation command other than
auto changeover operation?
YES
T Setting temperature
NO
:
S
YES
NO
NO
COOLING OPERATION
Thermostat remains
in OFF state for 6 minutes or
longer?
NO
System stops
or operation command other than
auto changeover operation?
NO
03-06
YES
YES